1850-1853 in Capeland, 1853-1868 in Berseba, Rehoboth, Nansannabis, Gobabis, Scheppmannsdorf, from 1869 parish office in North America; letters and diaries from missionary journeys in the holidays, 1849; letters and diary reports from various stations in South and South West Africa, 1850-1869;

1846-1867 in Rehoboth, Hoachanas; letters and diary reports, also by Wilhelmine Vollmer, née Wenzel;

Various manuscripts, including:; Church Chronicle of the Bastard Church of Rehoboth; Gemeentevergadering te Rehoboth, 1958; Commentary on the question of race in South Africa from a biblical point of view, Dr. Kritzinger